CN110644481A - Radial variable modulus composite pile and construction equipment and construction method thereof - Google Patents
Radial variable modulus composite pile and construction equipment and construction method thereof Download PDFInfo
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- CN110644481A CN110644481A CN201911013009.5A CN201911013009A CN110644481A CN 110644481 A CN110644481 A CN 110644481A CN 201911013009 A CN201911013009 A CN 201911013009A CN 110644481 A CN110644481 A CN 110644481A
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- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 94
- 239000011083 cement mortar Substances 0.000 claims description 102
- 238000003756 stirring Methods 0.000 claims description 91
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 8
- 239000011378 shotcrete Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000004568 cement Substances 0.000 description 9
- 230000002787 reinforcement Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a radial variable modulus composite pile and construction equipment and a construction method thereof. The invention is compounded by a multilayer structure with variable radial modulus, each layer is uniformly and completely stirred, and the stress ratio of the pile soil can be adjusted to a reasonable range, so that each component can fully exert respective effect, and the settlement design concept is embodied.
Description
Technical Field
The invention relates to the technical field of composite foundations, in particular to a radial variable modulus composite pile and construction equipment and a construction method thereof.
Background
The concept of composite foundation is formed in the 60's of the 20 th century, and means that part of soil body of a natural foundation is enhanced or replaced in the process of foundation treatment, or a reinforcement material is arranged in the natural foundation, and a reinforcement area is an artificial foundation consisting of a matrix (natural foundation soil body or improved natural foundation soil body) and a reinforcement body. The theory is the basis of analysis and design of a plurality of treatment methods, such as gravel piles, sand piles, cement soil mixing piles, jet grouting piles, plain concrete piles, CFG piles (cement fly ash gravel piles) and the like. The composite foundation has two basic characteristics: the reinforcing area is composed of a substrate and a reinforcing body, and is anisotropic and anisotropic: and secondly, under the load action, the matrix and the reinforcement body share the load action together. According to the direction of the reinforcement in the foundation, the composite foundation can be divided into a horizontal reinforcement composite foundation and a vertical reinforcement composite foundation. The vertical reinforcement composite foundation is commonly referred to as a pile composite foundation.
The pile body composite foundation has various technologies, wherein the cement-soil mixing pile technology is a common and economic soft soil foundation treatment technology, and the technical principle is that cement (slurry or powder) and foundation soil are forcibly mixed through a special mixing machine, and a series of physical and chemical reactions generated between the cement and the soil body are utilized to improve the strength of the foundation soil, change the soil property and form the composite foundation with integrity, water stability and certain strength.
At present, the cement-soil mixing pile becomes one of the most widely applied foundation treatment technologies in China, and is particularly widely applied to soft foundation treatment to increase the bearing capacity of the foundation, reduce foundation settlement and uneven settlement and improve stability. In recent ten years, the technology of the mud mixing pile is further researched, improved and perfected at home and abroad, but statistical analysis of a large amount of construction data of the cement mixing pile in recent years shows that uneven mixing and incomplete forming of a pile body are outstanding problems of the quality of the cement mixing pile under the working condition of a soft soil foundation at present, the cement and the soil body are separated into blocks or into a thousand-layer cake shape mainly due to the influence of factors such as insufficient mixing of the soil body and cement slurry among piles, uneven supply of the cement slurry and the like, and quality indexes such as uniformity, integrity, strength and the like cannot meet design requirements. The cement-soil mixing pile technology has the problems of uneven mixing, discontinuous pile body, low pile body strength, environmental pollution and resource waste caused by slurry bleeding during construction, and the like, and can directly cause unreliable pile forming quality and uncontrollable pile body modulus of the cement-soil mixing pile.
Therefore, it is necessary to develop a controllable variable modulus composite pile.
Disclosure of Invention
The invention aims to solve the problems and provide a radial variable modulus composite pile which is formed by compounding a multilayer structure with variable radial modulus, each layer is uniformly and completely stirred, and the pile-soil stress ratio can be adjusted to a reasonable range, so that each component can fully exert respective effect, and a settlement design concept is embodied. Another object of the present invention is to provide a construction apparatus and a construction method of a radial variable modulus composite pile.
In order to achieve the purpose, the technical scheme of the composite pile is as follows:
the utility model provides a compound stake of radial variable modulus, includes that cement mortar stem, stirring cement mortar soil that from interior to exterior set gradually enclose post and foundation soil, stirring cement mortar soil encloses the post and is formed by cement mortar and weak soil intensive mixing.
Compared with the prior art, the composite pile has the beneficial effects that:
the high-modulus cement mortar core column, the medium-modulus stirring cement mortar soil surrounding column and the low-modulus foundation soil form the composite foundation with gradually changed radial modulus, all parts are uniform and complete, and the pile-soil stress ratio can be adjusted to a reasonable range, so that all the components can fully exert respective effects, the concept of designing according to settlement is reflected, and the quality reliability of the composite pile is greatly improved.
Preferably, the cement mortar soil injection surrounding column is further arranged between the stirring cement mortar soil surrounding column and the foundation soil, and is formed by mixing injected cement mortar with soft soil.
By adopting the scheme, the sprayed cement mortar with the modulus between the cement mortar surrounding column with the medium modulus and the foundation soil with the low modulus is additionally arranged, so that the controllability of the modulus of the composite pile is further improved, and the strength of the composite pile is improved.
The technical scheme of the composite pile construction equipment is as follows:
the utility model provides a construction equipment of compound stake of radial variable modulus, includes auger stem, the drive arrangement and the cement mortar pond that are used for driving auger stem, the inside low pressure passageway that runs through that is equipped with of auger stem, low pressure passageway upper end is connected through the low-pressure pump cement mortar pond, lower extreme intercommunication drill bit are equipped with the low pressure export, the auger stem lower part is global to be equipped with a plurality of stirring vane group, stirring vane cavity sets up, and inside is equipped with the high-pressure chamber, the stirring vane bottom surface be equipped with in the high-pressure export of high-pressure chamber intercommunication, the inside high-pressure passageway that is equipped with of auger stem, high-pressure passageway one end is passed through the high-pressure pump and is connected cement mortar pond, other end intercommunication the high-.
Compared with the prior art, the construction equipment has the beneficial effects that:
the spiral drill rod is internally provided with a low-pressure channel and a high-pressure channel, the peripheral surface of the lower part of the spiral drill rod is provided with a hollow stirring blade, and cement mortar is injected into a drill hole by the low-pressure channel when the spiral drill rod is lifted for forming a core column and a surrounding column;
the stirring blade pre-stirs the surrounding foundation soil when the auger stem drills, fully stirs the pre-stirred foundation soil and cement mortar when the auger stem is lifted, and forms a stirring cement mortar enclosure column with high uniformity, so that the uniformity of the enclosure column is greatly improved, and the strength and the quality of the composite pile are ensured;
the stirring blade is internally provided with a high-pressure cavity communicated with the high-pressure channel, cement mortar is sprayed from a high-pressure outlet at the bottom surface of the stirring blade when the spiral drill rod is lifted, the cement mortar is thrown out under the action of centrifugal force and is mixed with peripheral foundation soil to form a sprayed cement mortar soil surrounding column, and thus a composite pile structure is quickly formed.
Preferably, the stirring blade group is evenly distributed along the axial direction of the auger stem, the stirring blade group comprises two stirring blades which are 180 degrees, and the adjacent stirring blade groups are arranged vertically relatively.
Through adopting above-mentioned scheme, improve stirring vane's stirring uniformity, guarantee the injection degree of consistency of the cement mortar that is erupted by the high pressure outlet simultaneously.
The technical scheme of the construction method of the composite pile is as follows:
a construction method of construction equipment of a radial variable modulus composite pile comprises the following steps:
s1, controlling the auger stem to drill holes to the designed depth through the driving device, and pre-disturbing peripheral soft soil through the stirring blades;
s2, controlling the spiral drill rod to lift through the driving device, controlling the low-pressure pump to work at the same time, spraying cement mortar from a low-pressure outlet, and pre-stirring peripheral soft soil for the second time by the stirring blades;
s3, controlling the auger stem to drill again through the driving device, wherein the auger stem extrudes the cement mortar injected in the step S2 into a soft soil layer with fully stirred periphery in the drilling process, and the stirring blades stir the cement mortar to form a stirring cement mortar soil surrounding column;
and S4, controlling the spiral drill rod to lift through the driving device, controlling the low-pressure pump to work at the same time, spraying cement mortar from a low-pressure outlet to form a cement mortar core column, and fully stirring the stirred cement mortar soil by the stirring blades to enclose the column.
Compared with the prior art, the construction method has the beneficial effects that:
according to the invention, the spiral drill rod with the stirring blades is added to quickly form the composite pile structure, so that the foundation soil and cement mortar are fully stirred in the construction process, the uniformity of each layer can be ensured, and the overall strength is improved;
the cement mortar of the cement mortar soil stirring enclosing column is squeezed into the foundation soil passing through the pre-stirring plate by the spiral drill rod, so that the cement mortar can be fully mixed;
the construction method is simple, does not need other construction equipment, and has low cost, good construction effect and strong universality.
Preferably, the step S2 further includes controlling the high-pressure pump to work, and the cement mortar is sprayed out from the high-pressure outlet on the bottom surface of the stirring blade and thrown out under the action of centrifugal force to be mixed with peripheral soft soil to form the sprayed cement mortar soil surrounding pillar.
Preferably, the step S4 further includes controlling the high-pressure pump to work, and the cement mortar is sprayed out from the high-pressure outlet on the bottom surface of the stirring blade and thrown out under the action of centrifugal force to be mixed with peripheral soft soil to form the sprayed cement mortar soil surrounding pillar.
By adopting the scheme, when the auger rod is lifted, the high-pressure pump is used for controlling the high-pressure outlet to spray cement mortar, and cement mortar is injected at low pressure and simultaneously a sprayed cement mortar soil surrounding column is formed at the outermost periphery.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a radial variable modulus composite pile according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of construction equipment of a radial variable modulus composite pile according to an embodiment of the present invention.
Shown in the figure:
1. a cement mortar core column;
2. stirring the cement mortar soil surrounding column;
3. injecting cement mortar soil to surround the column;
4. foundation soil;
5. a auger stem; 501. a low pressure channel; 502. a low pressure outlet; 503. a high pressure channel;
6. a cement mortar pool;
7. a stirring blade; 701. a high pressure chamber; 702. a high pressure outlet;
8. a low pressure pump;
9. a high pressure pump.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1, the present embodiment provides a radial variable modulus composite pile, which includes a cement mortar core column 1, a cement mortar soil stirring surrounding column 2 and foundation soil 4, which are sequentially arranged from inside to outside, wherein the cement mortar soil stirring surrounding column 2 is formed by fully stirring cement mortar and soft soil.
A cement mortar spraying surrounding column 3 is also arranged between the stirring cement mortar surrounding column 2 and the foundation soil 4, and the cement mortar spraying surrounding column 3 is formed by mixing sprayed cement mortar and soft soil.
The high-modulus cement mortar core column 1, the medium-modulus stirring cement mortar soil surrounding column 2 and the low-modulus foundation soil 4 form a composite foundation with gradually changed radial modulus, all parts are uniform and complete, and the pile-soil stress ratio can be adjusted to a reasonable range, so that all the components can fully exert respective effects, the concept of designing according to settlement is reflected, and the quality reliability of the composite pile is greatly improved.
The sprayed cement mortar with the modulus between the stirring cement mortar surrounding column 2 with the middle modulus and the foundation soil 4 with the low modulus is additionally arranged between the stirring cement mortar surrounding column and the foundation soil with the middle modulus, so that the controllability of the modulus of the composite pile is further improved, and the strength of the composite pile is improved.
As shown in fig. 2, the present embodiment further provides the above-mentioned construction equipment for a radial variable modulus composite pile, which includes an auger stem 5, a driving device for driving the auger stem 5, and a cement mortar pool 6, wherein a low-pressure channel 501 is provided inside the auger stem 5, an upper end of the low-pressure channel 501 is connected to the cement mortar pool 6 through a low-pressure pump 8, and a lower end of the low-pressure channel is communicated with a drill bit and is provided with a low-pressure outlet 502. The driving device is a common ground drilling machine, which is not shown in the figure.
The circumferential surface of the lower part of the auger stem 5 is provided with a plurality of stirring blade 7 groups, the stirring blades 7 are arranged in a hollow way, and a high-pressure cavity 701 is arranged inside the stirring blades.
The bottom surface of the stirring blade 7 is provided with a high-pressure outlet 702 communicated with the high-pressure cavity 701, a high-pressure channel 503 is arranged inside the auger stem 5, one end of the high-pressure channel 503 is connected with the cement mortar pool 6 through a high-pressure pump 9, and the other end of the high-pressure channel is communicated with the high-pressure cavity 701.
7 groups of stirring vane are along 5 axial evenly distributed of auger stem, and 7 groups of stirring vane are including two stirring vane 7 that are 180 degrees each other, and 7 groups of adjacent stirring vane set up perpendicularly relatively, improve stirring vane 7's stirring homogeneity, guarantee the injection degree of consistency of the cement mortar that is erupted by high pressure outlet 702 simultaneously.
A low-pressure channel 501 and a high-pressure channel 503 are arranged in the auger stem 5, the circumferential surface of the lower part of the auger stem is provided with a hollow stirring blade 7, and cement mortar is injected into a drill hole by the low-pressure channel 501 when the auger stem 5 is lifted for forming a core column and a surrounding column;
the stirring blades 7 pre-stir the surrounding foundation soil 4 when the auger stem 5 drills a hole, and fully stir the pre-stirred foundation soil 4 and cement mortar when the auger stem 5 is lifted to form a stirring cement mortar surrounding column with high uniformity, so that the uniformity of the surrounding column is greatly improved, and the strength and the quality of the composite pile are ensured;
the stirring blade 7 is internally provided with a high-pressure cavity 701 communicated with the high-pressure channel 503, cement mortar is sprayed out from a high-pressure outlet 702 on the bottom surface of the stirring blade 7 when the auger stem 5 is lifted, the cement mortar is thrown out under the action of centrifugal force and is mixed with the peripheral foundation soil 4 to form a sprayed cement mortar soil surrounding column 3, and thus a composite pile structure is quickly formed.
The embodiment also provides a construction method of the construction equipment of the radial variable modulus composite pile, which comprises the following steps:
s1, controlling the auger stem 5 to drill a hole by the foundation drilling machine until the hole reaches the designed depth, and pre-disturbing peripheral soft soil by the stirring blades 7;
s2, controlling the auger stem 5 to lift through the foundation drilling machine, controlling the low-pressure pump 8 to work at the same time, spraying cement mortar from the low-pressure outlet 502, and performing secondary pre-stirring on peripheral soft soil through the stirring blades 7;
s3, controlling the auger stem 5 to drill again through the foundation drilling machine, wherein in the drilling process, the auger stem 5 extrudes the cement mortar injected in the step S2 into a soft soil layer with fully stirred periphery, and the stirring blade 7 stirs the cement mortar to form a stirred cement mortar soil surrounding column 2;
and S4, controlling the auger stem 5 to lift through the foundation drilling machine, controlling the low-pressure pump 8 to work at the same time, spraying cement mortar from the low-pressure outlet 502 to form a cement mortar core column 1, and fully stirring and stirring the cement mortar soil surrounding column 2 by the stirring blade 7.
Preferably, the following operations can also be added at one or more of the above steps S2 and S4: and controlling the high-pressure pump 9 to work, spraying cement mortar from a high-pressure outlet 702 on the bottom surface of the stirring blade 7, throwing the cement mortar out under the action of centrifugal force, and mixing the cement mortar with peripheral soft soil to form the sprayed cement mortar soil surrounding column 3.
When the auger stem 5 is lifted, cement mortar is ejected from the high-pressure outlet 702 under the control of the high-pressure pump 9, and the shotcrete soil surrounding column 3 is formed at the outermost periphery while the cement mortar is injected at low pressure.
The specific operating frequency of the high-pressure pump 9 is determined by the actual design requirements.
In the embodiment, the spiral drill rod 5 with the stirring blades 7 is added to quickly form the composite pile structure, the foundation soil 4 and cement mortar are fully stirred in the construction process, the uniformity of each layer can be ensured, and the overall strength is improved;
in the embodiment, the cement mortar for stirring the cement mortar soil enclosure column 2 is extruded into the foundation soil 4 passing through the pre-stirring plate by the auger stem 5, so that the cement mortar can be fully mixed;
the construction method is simple, does not need other construction equipment, and is low in cost, good in construction effect and strong in universality.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. The utility model provides a compound stake of radial variable modulus which characterized in that, includes that cement mortar stem, stirring cement mortar soil that from interior to exterior set gradually enclose post and foundation soil, stirring cement mortar soil encloses the post and is formed by cement mortar and weak soil intensive mixing.
2. The radial variable modulus composite pile according to claim 1, wherein a shotcrete soil surrounding column is further arranged between the stirring cement mortar soil surrounding column and the foundation soil, and the shotcrete mortar soil surrounding column is formed by mixing shotcrete mortar and soft soil.
3. The construction equipment of the radial variable modulus composite pile as claimed in claim 1 or 2, comprising an auger stem, a driving device for driving the auger stem and a cement mortar pool, wherein a low-pressure passage is arranged inside the auger stem, the upper end of the low-pressure passage is connected with the cement mortar pool through a low-pressure pump, the lower end of the low-pressure passage is communicated with a drill bit and is provided with a low-pressure outlet, a plurality of stirring blade groups are arranged on the peripheral surface of the lower part of the auger stem, the stirring blades are arranged in a hollow manner and are provided with high-pressure cavities inside, the bottom surfaces of the stirring blades are provided with high-pressure outlets communicated with the high-pressure cavities, a high-pressure passage is arranged inside the auger stem, one end of the high-pressure passage is connected with the cement mortar pool through a high-pressure.
4. The construction equipment for the radial variable-modulus composite pile as claimed in claim 3, wherein the stirring blade groups are uniformly distributed along the axial direction of the auger stem, each stirring blade group comprises two stirring blades which are 180 degrees to each other, and the adjacent stirring blade groups are vertically arranged relatively.
5. A construction method of a construction equipment of a radial variable modulus composite pile according to claim 3, characterized by comprising the steps of:
s1, controlling the auger stem to drill holes to the designed depth through the driving device, and pre-disturbing peripheral soft soil through the stirring blades;
s2, controlling the spiral drill rod to lift through the driving device, controlling the low-pressure pump to work at the same time, spraying cement mortar from a low-pressure outlet, and pre-stirring peripheral soft soil for the second time by the stirring blades;
s3, controlling the auger stem to drill again through the driving device, wherein the auger stem extrudes the cement mortar injected in the step S2 into a soft soil layer with fully stirred periphery in the drilling process, and the stirring blades stir the cement mortar to form a stirring cement mortar soil surrounding column;
and S4, controlling the spiral drill rod to lift through the driving device, controlling the low-pressure pump to work at the same time, spraying cement mortar from a low-pressure outlet to form a cement mortar core column, and fully stirring the stirred cement mortar soil by the stirring blades to enclose the column.
6. The method for constructing a radial variable modulus composite pile according to claim 5, wherein the step S2 further comprises controlling the high pressure pump to work, and cement mortar is sprayed out from the high pressure outlet on the bottom surface of the stirring blade and thrown out under centrifugal force to be mixed with peripheral soft soil to form a surrounding column of sprayed cement mortar soil.
7. The method for constructing a radial variable modulus composite pile according to claim 5, wherein the step S4 further comprises controlling the high pressure pump to work, and cement mortar is sprayed out from the high pressure outlet on the bottom surface of the stirring blade and thrown out under centrifugal force to be mixed with peripheral soft soil to form a surrounding column of sprayed cement mortar soil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911013009.5A CN110644481A (en) | 2019-10-23 | 2019-10-23 | Radial variable modulus composite pile and construction equipment and construction method thereof |
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| CN201911013009.5A CN110644481A (en) | 2019-10-23 | 2019-10-23 | Radial variable modulus composite pile and construction equipment and construction method thereof |
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| CN110644481A true CN110644481A (en) | 2020-01-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136860A (en) * | 2021-04-21 | 2021-07-20 | 重鑫岩土技术(上海)有限公司 | Multi-liquid composite micro-disturbance cement mixing pile equipment |
| CN114164832A (en) * | 2021-11-30 | 2022-03-11 | 深圳市蛇口招商港湾工程有限公司 | Soft soil reinforcing structure below throwing filling block stone layer and construction method |
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| JPH08144265A (en) * | 1994-11-21 | 1996-06-04 | Onoda Kemiko Kk | Soil improvement method |
| CN105113498A (en) * | 2015-08-17 | 2015-12-02 | 建设综合勘察研究设计院有限公司 | Method for constructing high-strength core composite piles |
| CN106284305A (en) * | 2016-10-17 | 2017-01-04 | 沙焕焕 | The expanding stiff composite pile of high spray |
| CN211621559U (en) * | 2019-10-23 | 2020-10-02 | 江苏鸿基水源科技股份有限公司 | Construction equipment for radial variable modulus composite pile |
-
2019
- 2019-10-23 CN CN201911013009.5A patent/CN110644481A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08144265A (en) * | 1994-11-21 | 1996-06-04 | Onoda Kemiko Kk | Soil improvement method |
| CN105113498A (en) * | 2015-08-17 | 2015-12-02 | 建设综合勘察研究设计院有限公司 | Method for constructing high-strength core composite piles |
| CN106284305A (en) * | 2016-10-17 | 2017-01-04 | 沙焕焕 | The expanding stiff composite pile of high spray |
| CN211621559U (en) * | 2019-10-23 | 2020-10-02 | 江苏鸿基水源科技股份有限公司 | Construction equipment for radial variable modulus composite pile |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136860A (en) * | 2021-04-21 | 2021-07-20 | 重鑫岩土技术(上海)有限公司 | Multi-liquid composite micro-disturbance cement mixing pile equipment |
| CN114164832A (en) * | 2021-11-30 | 2022-03-11 | 深圳市蛇口招商港湾工程有限公司 | Soft soil reinforcing structure below throwing filling block stone layer and construction method |
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